Universal drain adapter



FIG. 1 is a top perspective view of a universal drain adapter, showing my new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is an elevation view thereof; and,

FIG. 5 is a bottom plan view thereof. 

CLAIM The ornamental design for a universal drain adapter, as shown and described. 